package com.zhuang.jdk8.exer;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.stream.Stream;

public class TestTransaction {

	public static void main(String[] args) {
		TestTransaction testTransaction = new TestTransaction();
		testTransaction.before();
		testTransaction.test1();
		testTransaction.test2();
		testTransaction.test3();
		testTransaction.test4();
		testTransaction.test5();
		testTransaction.test6();
		testTransaction.test7();
		testTransaction.test8();
	}

	List<Transaction> transactions = null;

	public void before() {
		Trader raoul = new Trader("Raoul", "Cambridge");
		Trader mario = new Trader("Mario", "Milan");
		Trader alan = new Trader("Alan", "Cambridge");
		Trader brian = new Trader("Brian", "Cambridge");

		transactions = Arrays.asList(new Transaction(brian, 2011, 300), new Transaction(raoul, 2012, 1000),
				new Transaction(raoul, 2011, 400), new Transaction(mario, 2012, 710), new Transaction(mario, 2012, 700),
				new Transaction(alan, 2012, 950));
	}

	// 1. 找出2011年发生的所有交易， 并按交易额排序（从低到高）

	public void test1() {
		System.out.println("test1........................");
		transactions.stream().filter((t) -> t.getYear() == 2011)
				.sorted((t1, t2) -> Integer.compare(t1.getValue(), t2.getValue())).forEach(System.out::println);
	}

	// 2. 交易员都在哪些不同的城市工作过？

	public void test2() {
		System.out.println("test2........................");
		transactions.stream().map((t) -> t.getTrader().getCity()).distinct().forEach(System.out::println);
	}

	// 3. 查找所有来自剑桥的交易员，并按姓名排序

	public void test3() {
		System.out.println("test3........................");
		transactions.stream().filter((t) -> t.getTrader().getCity().equals("Cambridge")).map(Transaction::getTrader)
				.sorted((t1, t2) -> t1.getName().compareTo(t2.getName())).distinct().forEach(System.out::println);
	}

	// 4. 返回所有交易员的姓名字符串，按字母顺序排序

	public void test4() {
		System.out.println("test4........................");
		transactions.stream().map((t) -> t.getTrader().getName()).sorted().forEach(System.out::println);

		System.out.println("-----------------------------------");

		String str = transactions.stream().map((t) -> t.getTrader().getName()).sorted().reduce("", String::concat);

		System.out.println(str);

		System.out.println("------------------------------------");

		transactions.stream().map((t) -> t.getTrader().getName()).flatMap(TestTransaction::filterCharacter)
				.sorted((s1, s2) -> s1.compareToIgnoreCase(s2)).forEach(System.out::print);
	}

	public static Stream<String> filterCharacter(String str) {
		List<String> list = new ArrayList<>();

		for (Character ch : str.toCharArray()) {
			list.add(ch.toString());
		}

		return list.stream();
	}

	// 5. 有没有交易员是在米兰工作的？

	public void test5() {
		System.out.println("test5........................");
		boolean bl = transactions.stream().anyMatch((t) -> t.getTrader().getCity().equals("Milan"));

		System.out.println(bl);
	}

	// 6. 打印生活在剑桥的交易员的所有交易额

	public void test6() {
		System.out.println("test6........................");
		Optional<Integer> sum = transactions.stream().filter((e) -> e.getTrader().getCity().equals("Cambridge"))
				.map(Transaction::getValue).reduce(Integer::sum);

		System.out.println(sum.get());
	}

	// 7. 所有交易中，最高的交易额是多少

	public void test7() {
		System.out.println("test7........................");
		Optional<Integer> max = transactions.stream().map((t) -> t.getValue()).max(Integer::compare);

		System.out.println(max.get());
	}

	// 8. 找到交易额最小的交易

	public void test8() {
		System.out.println("test8........................");
		Optional<Transaction> op = transactions.stream().min((t1, t2) -> Integer.compare(t1.getValue(), t2.getValue()));

		System.out.println(op.get());
	}

}